Do thoughts and feelings affect physical things?

As a form of potential energy I suppose, if you can think about making a cake, you have motivation to make a cake, you can make a cake. In that way, your thoughts allow for action, which equals energy.

Yes, if your angry or upset you'll probably talk less and be less willing to help others where if your happy your more likely to help others and be kinder to others

No bc a lot of things r still theories n unproven